Company Details

  • HAFID INTERNATIONAL LIMITED

  •  [Zhejiang,China]
  • Business Type:Manufacturer
  • Main Mark: Americas , Europe , Middle East
  • Exporter:41% - 50%
  • Certs:GS, ISO9001, ISO9002, ISO14001, ISO14004, ISO/TS16949
Inquiry Basket ( 0 )

HAFID INTERNATIONAL LIMITED

Home > News > How to solve Cummins engine start difficult?
News

How to solve Cummins engine start difficult?

Did you meet the Cummins engine start difficult, but do not know where to start? Look at the 8 different cases to help you learn more:

Case 1
Starter and engine are normal start speed, but not ignition; or sometimes before it's final starts, must experience many and long-time starting:

Cause: The fuel line has air.
Fault nature: mechanical failure.
Fault analysis: For ISL & ISZ engines, automatic exhausting can be performed with an electronic pump. Connected to power, electronic pump automatically work for 30 seconds. Disconnect if the switch is switched on. Repeat this step to allow engine exhaust.

For the ISB & ISD engine, there is no electronic fuel pump, the oil row of air is relatively difficult, often the operator felt the air to exclude clean, the actual or not completely clean. According to the actual use of the situation, you should release the oil pump back to the oil bolt to drain the air, if necessary, can release the high-pressure tubing, the use of starter to drive the engine idling to air; if only the release of the fuel filter bleed screw Exhaust air, may not be easy to completely eliminate the fuel pipeline air, more laborious.
Treatment method: exhaust the fuel pipeline air.

Case 2
Both the starter and the engine have a normal starting speed, but no ignition.
Cause: The ECU has a fault code.
Fault nature: electrical failure.
Fault analysis: The vehicle are normal by checked from the mechanical aspects, diagnosed with a diagnostic device found "water temperature sensor", "rail pressure sensor", "accelerator pedal" and some fault display, clear the fault code, the engine started smoothly. This situation is maybe the maintenance or operation of the electrical control system connector plug-in operation, so the system will generate a fault code stored in the ECU, the system will protect the role of some functions can not even start.
Treatment method: Clear the fault code.

Case 3
Both the starter and the engine have a normal starting speed, but no ignition.
Cause: The engine harness is damaged or the connector is defective.
Fault nature: electrical failure.
fault analysis: the probability of damage to the engine harness is small, big probability is connector defective. Do not replace the engine harness easily before eliminate the connector defective reason. At this point, you can use the diagnostic device to diagnose the approximate area of ??the occurrence of the failure, and then excluded.
Treatment Method: Replace the engine harness or re-plug the connector (Note: must turn off the power first).

Case 4
Both the starter and the engine have a normal starting speed, but no ignition.
Cause of failure: The pump is not installed correctly or the flywheel does not match.
Fault nature: mechanical failure.
Fault analysis: This situation usually occurs in the engine that has been replaced with the oil pump or flywheel. For oil pump installation engine, the oil pump must be installed correctly. In addition, if the flywheel is replaced, it must use the original flywheel that have the sensor holes.
Treatment Method: reinstall the pump or use the matched flywheel.

Case 5
Both the starter and the engine have a normal starting speed, but no ignition.
Cause: Crankshaft speed sensor and camshaft position sensor are faulty.
Fault nature: electrical failure.
Failure analysis: This situation is generally not much. Use the diagnostic instrument to detect the crankshaft speed sensor and camshaft position sensor at the same time, it will show the fault display.
Treatment Method: Replacement.

Case 6
Both the starter and the engine have a normal starting speed, but no ignition.
Cause of failure: High pressure common rail failure.
Fault nature: electrical failure.
Fault analysis: This fault is sometimes a rail pressure sensor failure, sometimes the oil rail pressure control valve failure, if the rail pressure control valve in the open state, the rail pressure can not be established, thus can not start.
Treatment Method: Replacement.

Case 7
The starter has no speed.
Cause of failure: No power supply, insufficient voltage or starter failure.
Fault nature: electrical failure.
Fault analysis: the starter electric current is too large or the ring gear can not be engaged with the flywheel; the voltage is insufficient and the engine can not reach the starting speed.
Treatment Method: Turn on the power or replace the starter or charge the battery.

Case 8
Both the starter and the engine have a normal starting speed, but no ignition.
Cause: The neutral position switch or clutch switch is faulty.
Fault nature: electrical failure.
Failure analysis: This fault should belong to vehicle failure.
Treatment: Replacement
Communicate with Supplier?Supplier
jack Mr. jack
What can I do for you?
Chat Now Contact Supplier